Nortel Networks Mediant TP-1610 SIP User Manual
Page 228
Mediant 2000 SIP
Mediant 2000 SIP User’s Manual
228
Document #: LTRT-72504
ISDN Release
Reason
Description
SIP
Response
Description
66
Channel type not implemented
480
*
Temporarily unavailable
69
Requested facility not implemented
503
*
Service unavailable
70
Only restricted digital information bearer
capability is available
503
*
Service unavailable
79
Service or option not implemented
501
Not implemented
81
Invalid call reference value
502
*
Bad gateway
82
Identified channel does not exist
502
*
Bad gateway
83
Suspended call exists, but this call identity
does not
503
*
Service unavailable
84
Call identity in use
503
*
Service unavailable
85
No call suspended
503
*
Service unavailable
86
Call having the requested call identity has been
cleared
408
*
Request timeout
87
User not member of CUG
503
Service unavailable
88
Incompatible destination
503
Service unavailable
91
Invalid transit network selection
502
*
Bad gateway
95
Invalid message
503
Service unavailable
96
Mandatory information element is missing
409
*
Conflict
97
Message type non-existent or not implemented
480
*
Temporarily not available
98
Message not compatible with call state or
message type non-existent or not implemented
409
*
Conflict
99
Information element non-existent or not
implemented
480
*
Not found
100
Invalid information elements contents
501
*
Not implemented
101
Message not compatible with call state
503
*
Service unavailable
102
Recovery of timer expiry
408
Request timeout
111
Protocol error
500
Server internal error
127
Interworking unspecified
500
Server internal error